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(No Model.) .2 Sheets-Sheet 1. H. F. GRANDALL 8: E. J. BIRKETT.

GRAIN BINDER.

No. 582,500. Patented Mayll, 1897.

.Dvv 671/60 rs @ZMM (No Model.) 2 SheetsSheet 2.

H. P. CRANDALL & E. J-. BIRKETT.

GRAIN BINDER.

No. 582,500. Patented May 11,1897.

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ms ravens so. mmoqfna, WASNINOTO'L a a UNITED STATES PATENT FFICE.

HENRY F. CRANDALL AND EDWVARD J. BIRKETT, OF MILWVAUKEE, VIS- CONSIN,ASSIGNORS TO THE MIIAVAUKEE HARVESTER COMPANY, OF

SAME PLACE.

GRAIN-BINDER.

SPECIFICATION forming part of Letters Patent No. 582,500, dated May 1 1,1897.

Application filed S t b 30,1895. Serial No. 564,135. (No model.)

To all whom it may concern.-

Be it known that we, HENRY F, CRANDALL and EDWARD J. BIRKETT, ofMilwaukee, in the county of Milwaukee and State of Wiscousin, haveinvented certain new and useful Improvements in Grain-Binders; and we dohereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it pertains to make and use the same, reference being had,to the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

Our improvements relate particularly to the tripping mechanism by whichthe binding mechanism is automatically started and stopped at the propertimes.

The main object of our invention is to simplify and improve theconstruction and operation of devices of this class.

It consists of certain novel features in the construction andarrangement of the component parts of the tripping mechanism, as

hereinafter particularlydescribed, and pointed out in the claims. 7

In the accompanying drawings like letters design ate the same parts inthe several figures.

Figure 1 is an end view of a binder to which our improvements areapplied. Fig. 2 is a like view, on an enlarged scale, of parts of thebinder embodying our improvements. Fig. 3 is a plan view of thetrip-arm. Fig. 4is an inverted plan view of the parts shown in Fig. 2.Figs. 5 and 6 are detail views, on an enlarged scale, of the device foradj ustably attaching to the trip-arm the spring by which it isyieldingly connected with the needlearm, Fig. 5 being an end, and Fig. 6a side, view. Figs. 7 and 8 are detail views, on an enlarged scale, ofthe driver, Fig. 7 being an end view and Fig. 8 a side view; and Fig. 9is a section on the line 9 9, Fig. 1, showing the under side of theadjustable spring-catch for holding the knotter-shaft from turningbackward. Adesignates the binder-frame; B, the knotter-shaft, providedwith a gear and cam wheel 0; D, the needle crank-arm, which is connectedwith the gear-wheel O by a rod cl 'E, a continuously-rotatingdriving-shaft, which may be the packer-shaft, provided with a driverF,fixed thereon, and apinion G, loosely mounted thereon, and connected bybevelgears or pinions (not shown) and a shaft H with the gear-wheel C,and I the compressorarm, all of the usual or any suitable constructionand arrangement. The compressor-shaft is provided with a crank-arm i,which is connected by a rod J with a bell-crank lever K, fulcrumed tothe binder-frame at its elbow adjacentto the gear-wheel" O and providedat its opposite end with a friction-roller k, which engages with a camor guide 0, formed or provided on the face of said gear-wheel O. The rodJ has a longitudinal yielding spring connection 3, whereby thecompressor-arm I is permitted to yield to the pressure of grainaccumulated against it by the packers, so as to shift the trip-arm andset the binding mechanism in operation, as hereinafter explained, whilethe friction-roller 76 is stationarily held by its guide a, the functionof which is to permit the compressor-arm to drop below the binder-deckat the proper time for discharging the bundle, and after the bundle isdischarged to turn it upwardly into operative position. The guide 0 isformed with a seat or depression for the roller to complete the movementof the binding mechanism in case the driver fails for any reason tobring it home. The pinion G has on its outer face, next to the driver F,a dog g, pivoted thereto by a-bolt or stud g and provided with a studcarrying a friction-roller g, which a spring 9 tends to force into thepath of wings or projections f f of the driver F. The movement of thedog g is limited in both directions by its engagement with the hub ofpinion G.

L is a trip-arm loosely mounted upon the needle-shaft next to the needlecrank-arm D and adapted to engage with the dog 9 and hold it, againstthe force of spring 9 out of engagement with the driver F. It isyieldingly connectedwith the needle crank-arm bya spring M, which iscoiled around a thimble m (shown in Figs. 5 and 6) and caught at one endon an overhanging lug m, formed with said thimble, the other end beinghooked or caught under the needle crank-arm D, as shown in Figs. 2 and4.

The thimble m is formed at one end, as

shown in Figs. 5 and 6, with a toothed or clutch face adapted to engagewith a corresponding face on the trip-arm L, to which it is secured by abolt m as shown in Fig. 4-. To relieve the bolt of strain and hold thethimble securely in place, the arm L is formed on one side with a studZ, as indicated by dotted lines in Fig. 3, upon which said thimble isfitted and adapted to turn. The arm L is also formed on opposite sidesof the needle crank-arm with overhanging projections Z l, by which itsmovement with respect to said needle crank-arm is limited.

The pinion G is formed on its outer face with a curved ledge g, which isadapted to engage with a projection Z on the adjacent side of thetrip-arm L and guide the free end of the latter into engagement with theend of dog g, as shown in Fig. 2.

It sometimes occurs in the operation of a binder that the knotter andneedle-shafts are not quite returned to their home positions after abundle is bound and discharged on account of the slow movement of themachine, as in turning corners, or other causes, and to insure acomplete return movement of the parts named under all conditions weprovide the cam or guide a with a seat or depression, as hereinbeforementioned. In case the driver fails to carry the raised portion of thecam or'gnide 0, just before said seat or depression, past the roller 70,as soon as the compressor-arm I is subjected to the pressure of grain itwill tend to force said roller against the guide into said seat ordepression and thus turn the gear C forward.

The outer face of the pinion G is formed with an incline 9 adapted toengage the upper side of the projection Z and positively turn thetrip-ar1n L into position to engage the end of dog 9, as shown in Fig.2, and thereby stop the binding mechanism in case said trip-arm shouldbeheld against the tension of spring M out of the path of the dog by thecompressor-arm I becoming entangled with straw and failing to bereturned home or by any other cause. The projection 9 shown on pinion Gis simply a side bearing for dog g to prevent side strain upon its pivotbolt or stud g.

The trip-arm L is formed or provided at the end opposite the driver witha toe or projection I in the path of an arm 2" on the compressor-sh aft,which arm by engagement with saidtoe is adapted to throw the oppositeend of the trip-arm, against the tension of spring M, upwardly out ofengagement with the end of dog the incline g terminating at its innerend, so as to clear the projection Z when the parts are in the positionsshown in Figs. 1 and 3. Normally the arm t is held by the spring j outof contact with the toe Z and the recoil of the compressor-arm and itsconnections when they are brought violently or suddenly home is thusprevented from being transmitted to the trip-arm and throwing it out ofengagement with dog g.

N is a spring adapted to pass behind a projection c on gear 0, as shownin Fig. 9, and lock the bindin mechanism in home position or prevent itfrom turning backward. It is attached at one end to a block or, which isslotted and adjustably secured to the binder rail to by a bolt a. Thisavoids the time, 1abor, and annoyance of chipping, filing, and fitting,which would otherwise be often necessary in assembling and adjusting theparts of the binder, and serves also to take up wear.

Our improved tripping mechanism operates as follows: Assuming the partsto be in the positions shown in Figs. 1 and 2, when sufficient grain hasbeen accumulated against the compressor-arm I to overcome the resistanceof the springs j and M the arm i will be carried into engagement withthe toe Z of the trip-arm L and will turn the latter upwardly out ofengagement with the dog g. The roller g of the dog, which is thusreleased, is thrown by the spring g into engagement with one of theprojections f of the driver F and locks the pinion G therewith and turnsit in the direction indicated by the arrows, Figs. 1 and 2. Motion isthus communicated to the knotter and needle shafts through theconnections hereinbefore described, the knotter-shaftbeing driven in thedirection indicated by the arrow, Fig. 1. As the needle crank-armreturns to its starting-point the projection Z engaging with the curvedledge g?" on gear G, positively guides the end of the trip-arm L intoproper engagement with the dog g, thus stopping the pinion G and theseveral parts of the binder driven thereby in the positions in whichthey are shown in Fi 1.

In practice the spring j is made of sufficient tension only to sustainthe compressor-arm and its connections and to hold the arm 71 out ofengagement with the toe Z of the trip-arm when the compressor-arm is notsubjected to pressure. The force required to start the binding mechanismis consequently controlled by the spring M, which can be easilyadjustedby loosening the bolt m and turning the thim ble m thereon to increaseor diminish its tension and thereby vary the size of the bundles asdesired.

WVe claim 1. In a grain-binder, the combination of acontinuously-rotatin g driving-shaft, a driver fixed thereon, a pinionloosely mounted upon the driving-shaft and provided with a dog adaptedto engage with said driver, the needleshaft provided with a crank'arm, atrip-arm pivoted upon the needle-shaft adjacent to its crank-arm andadapted to turn and hold the dog out of engagement with the driver whenthe needle-crank descends to home position, said pinion having a curvedledge adapted to hold the trip-arm outwardly in the path of the dog andto guide said trip-arm into engagement with said dog, substantially asand for the purposes set forth.

2. In a grain-binder, the combination with the needle-shaft and itscrank-arm, of a continuously-rotating driving-shaft having a driverfixed thereon, a pinion loosely mounted on the driving-shaft next to thedriver and provided with a dog adapted when released to engagetherewith; and a trip-arm pivoted on the needle-shaft and adapted toengage with and normally hold said dog out of engagement with thedriver, said pinion having an incline on the side next to the triparmadapted to draw it toward the driver into the path of said dog, and acurved ledge inside of said incline adapted to arrest the trip-arm inits movement toward the driver inposition to engage said dog,substantially as and for the purposes set forth.

8. In a grain-binder, the combination with the needle-shaft andcrank-arm, the knottershaft and cam-wheel, and the compressor-arm havinga spring or yielding operating connection with said cam-wheel, of acontinuouslyrotating driving-shaft provided with a driver, a pinionloosely mounted upon the drivingshaft and provided with a dog and springtending to hold it in engagement with said driver, and a trip-armpivoted on the needleshaft and having a toe or projection in the path ofan arm on the compressor-shaft, said arm being normally held out ofcontact with said too or projection by the spring connection between thecompressor-shaft and camwheel, substantially as and for the purposes setforth. 7

In testimony that we claim the foregoing as our own we affix oursignatures in presence of two witnesses.

HENRY F. ORANDALL. EDWARD J. BIRKETT.

Witnesses:

OHAs. L. Goss, R. C. LIVESAY.

